Allow all passable blocks to be used above seats

Author: Brycey92

src/main/java/zmaster587/advancedRocketry/tile/TileRocketAssemblingMachine.java

@@ -350,7 +350,7 @@ public void scanRocket(World world, BlockPos pos2, AxisAlignedBB bb) {
 								thrustNuclearReactorLimit += ((IRocketNuclearCore) block).getMaxThrust(world, currBlockPos);
 							}
 
-							if(block instanceof BlockSeat && world.getBlockState(abovePos).getBlock().isAir(world.getBlockState(abovePos), world, abovePos)) {
+							if(block instanceof BlockSeat && world.getBlockState(abovePos).getBlock().isPassable(world, abovePos)) {
 								stats.addPassengerSeat((int) (x), yCurr - actualMinY, (int) (z));
 							}